My first sentence was not as well formed as it could have been although if you had read a bit more closely you would have seen my point. Try this:

I'm no director of research - far from it... but my limited understanding tells me that plants do not use the entire light spectrum equally. In fact, they use quite limited amounts of white, yellow, orange and green.

The point being that plants do not need the same levels of white, yellow, orange or green as they do red and blue. They use almost no green spectrum (our plants are green because they reflect this light back rather than absorb it). A grow that benefits from direct sun light tells us nothing about their ability to absorption white, yellow, orange or green spectrum. That's just misplaced causality.

Thanks headshake, I knew that about white light and it occurred that I should up pack that but you did it for me.
bigsby Reviewed by bigsby on . Drowning in conflicting plant graphs - help! (LED) Still trying to design my LED light through clear understanding and not just mimicking. There is one photosynthetic response curve that shows yellow light has more effect than blue light and that green, while lower, is almost as useful. Other articles say green light may stunt plant growth and that yellow is not much more useful (despite the huge success of HPS). Then there is the photosynthesis action spectrum showing that violet/purple light (400nm) has the highest absorption peak Rating: 5